(19)
(11) EP 2 730 749 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.11.2017 Bulletin 2017/44

(43) Date of publication A2:
14.05.2014 Bulletin 2014/20

(21) Application number: 13005242.6

(22) Date of filing: 06.11.2013
(51) International Patent Classification (IPC): 
F01D 11/02(2006.01)
 F02C 7/28(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 12.11.2012 GB 201220268

(71) Applicant: Rolls-Royce plc
London SW1E 6AT (GB)

(72) Inventor:
  • Bird, Colin
    Derby, DE24 8QD (GB)

(74) Representative: Rolls-Royce plc 
Intellectual Property Dept SinA-48 PO Box 31
Derby DE24 8BJ
Derby DE24 8BJ (GB)

   


(54) Apparatus and method for measuring gas flow through a rotary seal


(57) A method of measuring a flow rate of a first fluid through a rotary seal of a gas turbine engine comprising controlling a probe flow of a second fluid at an intra-seal cavity and measuring a pressure change in the first fluid caused by the probe flow.







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